John Massimilian, DO
NPI 1598721508 · Emergency Medicine Physician · Crown Point, IN
John Massimilian, DO is a Emergency Medicine Physician provider in Crown Point, IN (NPI 1598721508).
Provider details
- NPI number
- 1598721508
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- 02001829A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Emergency Medicine Physician207P00000X
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Massimilian's NPI number?
- John Massimilian's National Provider Identifier (NPI) is 1598721508, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Massimilian's specialty?
- John Massimilian is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Massimilian located?
- John Massimilian's practice location on file with NPPES is 1201 S Main St, Crown Point, IN 46307-8481.
- What is John Massimilian's phone number?
- The practice phone number listed in the NPPES registry for John Massimilian is (219) 757-6310.
- Is John Massimilian's NPI active?
- Yes — John Massimilian's NPI (1598721508) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.